First off, i've been using Tidal exclusively for 6 years now.With a Chord Mojo.
The MQA debacle is far from a Chord folks thing, Rob Watts just seems to share the opinion of many that refused to jump on the bandwagon, the general consensus nowadays is that it is lossy. Sure some MQA stuff sounds better than the flac files, i attribute that to mastering. Seeing how Tidal is investigated for embezzlement this MQA being lossy is just a drop in a bucket compared to other things they do.
What premium price? Half the cost of the Bartok? you can just add full MQA decoding after with a dedicated streamer if you really think that makes so much of a difference. And still have money left for an M-scaler.
I'm going to keep using Tidal once i get my DAVE. Pretty soon Amazon Music Ultra HD will blow everyone out of the water anyway and MQA will go the way of SACD. I was seriously considering the Bartok but i can't justify the price difference, even though it is nicer to look at
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Don't get hung up on minor specs,especially infamous ones such as MQA. If you want to get the Bartok get it for what it is, not for jumping on the gimmick bandwagon.
Sony, a company a lot bigger than DCS, with an even bigger cult following in Asia, went as far as to advertise using "Kimber Kable " for internal wiring on their 10k walkman. I assure you that's only because of Kimber's popularity with audiophiles. I hardly think DCS is above it.